ExpandableListView簡單實現二級列表
阿新 • • 發佈:2018-12-21
xml建立一個 ExpandableListView
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="${relativePackage}.${activityClass}" > <ExpandableListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/expandableListView"> </ExpandableListView> </RelativeLayout>
ExpandableListView的一級列表佈局
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="80dp" android:orientation="vertical" > <TextView android:id="@+id/one_name" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_centerInParent="true" android:textSize="20sp" android:text="我是一級列表"/> </RelativeLayout>
ExpandableListView的二級列表佈局
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="60dp" android:orientation="horizontal" > <ImageView android:id="@+id/img" android:layout_width="60dp" android:layout_height="60dp" android:src="@drawable/ic_launcher"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tow_name" android:layout_marginTop="20dp" android:layout_marginLeft="20dp" android:text="嘻嘻哈哈"/> </LinearLayout>
Java程式碼
package com.example.expandablelistview;
import java.util.ArrayList;
import java.util.List;
import android.R.string;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private MainActivity.Madapder madapder;
private ExpandableListView expandableListView;
private List<String> allList;
private List<List<Person>> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//獲取控制元件
expandableListView=(ExpandableListView) findViewById(R.id.expandableListView);
//初始化資料
initData();
//自定義介面卡
madapder=new Madapder();
expandableListView.setAdapter(madapder);
}
public void initData() {
allList=new ArrayList<String>();
allList.add("列表①");
allList.add("列表②");
allList.add("列表③");
list=new ArrayList<List<Person>>();
List<Person> list1=new ArrayList<Person>();
list1.add(new Person(" 虞姬"));
list1.add(new Person(" 甄姬"));
list1.add(new Person(" 阿狸"));
list1.add(new Person(" 狐狸"));
List<Person> list2=new ArrayList<Person>();
list2.add(new Person(" 李白"));
list2.add(new Person(" 項羽"));
list2.add(new Person(" 荊軻"));
list2.add(new Person(" 曹操"));
List<Person> list3=new ArrayList<Person>();
list3.add(new Person(" 公孫離"));
list3.add(new Person(" 孫尚香"));
list3.add(new Person(" 狄仁傑"));
list3.add(new Person(" 蔡文姬"));
list.add(list1);
list.add(list2);
list.add(list3);
}
class Madapder extends BaseExpandableListAdapter{
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return allList.size();
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return list.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return allList.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return list.get(groupPosition).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
GroupView groupView;
if(convertView==null){
groupView=new GroupView();
//獲取一級列表的佈局
convertView=View.inflate(MainActivity.this,R.layout.item_1, null);
//複用控制元件
groupView.name=(TextView) convertView.findViewById(R.id.one_name);
//繫結
convertView.setTag(groupView);
}else {
groupView = (GroupView) convertView.getTag();
}
//給控制元件設定值
groupView.name.setText(allList.get(groupPosition));
return convertView;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ViewHolder Holder;
if(convertView==null){
Holder=new ViewHolder();
//獲取二級列表的佈局
convertView=View.inflate(MainActivity.this,R.layout.item_2, null);
//複用控制元件
Holder.text_name=(TextView) convertView.findViewById(R.id.tow_name);
//繫結
convertView.setTag(Holder);
}else {
Holder = (ViewHolder) convertView.getTag();
}
//給控制元件設定值
Holder.text_name.setText(list.get(groupPosition).get(childPosition).getName());
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
class ViewHolder{
TextView text_name;
}
class GroupView{
TextView name;
}
}
Java_封裝類
package com.example.expandablelistview;
public class Person {
String name;
public Person() {
// TODO Auto-generated constructor stub
}
public Person(String name) {
super();
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Person [name=" + name + "]";
}
}